Die-finishing machine.



G. H. WEBB.

DIE FINISHING MACHINE. APPLICATION FILED 00w. 26,1907.

904,288. Patented Nov. 17, 1908.

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G. H. WEBB. DIE PINISHIN G MACHINE. APPLIOATIOK FILED 00w. 26,1907.

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G. H. WEBB. DIE FINISHING MACHINE.

APILIOATIDN FILED 00m. 26,1907.

904,288. Patented Nov. 17, 1908.

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ITTU eTUt'OT Wfinesses B wm w UNITED STATES PATENT OFFICE.

GEORGE H. WEBB, OF PAWTUCKET, RHODE ISLAND.

DIE-FINISHING MACHINE.

To all whom it may concern:

Be it known that I. Gnoncn H. Vane, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Die-Finishing Machines, of which the following is a specification.

My invention relates to a machine for finishing dies, and the object of my invention is to provide a machine for finishing dies of different kinds, and used for different purposes, of simple construction and semi-automatic in operation.

My invention consists in certain novel features of construction of my improvements as will be hereinafter fully described.

Referring to the drawings :-Figure 1 is a front View of a die finishing machine embodying my improvements. tical section through the lower part of the machine shown in Fig. 1. Fig. 3 is a vertical section through the upper part of the machine shown in Fig. 1.' Fig. 4 is a vertical section, on line 4, 4, Fig. 3, looking in the direction of arrow a, same figure. Fig. 5 is a vertical section through the lower end of the tap holder and the tap, shown in Fig. 1. Fig.6 is a side elevation of a die finished on the machine. Fig. 7 is a central vertical sec tion through the die shown in Fig. 6. Fig. 8 is an end view of the die shown in Fig. 6. Fig. 9 shows, on an enlarged sale, a plan view of a modified construction of the die holder for an open or sectional die, and, Fig. 10 corresponds to Fig. 2, but shows the die holder and sectional die shown in Fig. 9, instead of the die holder shown in Fig. 2, and also shows a nut on the lower end of the threaded shank. Figs. 2 to 10, inclusive, are on an enlarged scale.

In the accompanying drawings, 1 is the top of a bench or table, having legs 2 secured to the floor; 3 is a beam to which the hanger or support 4 is secured. To the hanger or support 4 is detachably secured a plate 5, having thereon a bearing 6 for the shaft 7, carrying at its outer end a belt pulley S and a belt bulley 9, and having fast on its inner end a pinion 10, which meshes with and drives a gear 11 fast on a shaft 12, having hearings in a sleeve 13 on the plate 5, see Fig. 3. The gear 11 carries a pin 14, cccentric to said gear; said pin 14 extends into a socket or recess in a block 15, which is guided and has a vertical motion in a ver- Specification of Letters Patent.

Application filed October 26, 1907.

Fig. 2 is a ver- Patented Nov. 17, 1908.

Serial No. 399,345.

tically extending slot 16 in a plate 16, which is mounted at its upper and lower ends in undercut ways, shown by broken lines in Fig. 4, on the hanger 4, to have a reciprocating horizontal movement in said ways, communicated to it through the rotation of the gear 11 and the engagement of the pin 14 with the block 15.

Secured to the plate 16 is a plate 17, having thereon rack teeth 17, which mesh with and rotate a pinion 18. The pinion 18 is keyed on a vertically extending shaft 19, and extends over the upper end of a conical shaped post 4 on the hanger 4, see Fig. 3, and has a downwardly extending hub portion 18 extending within said post 4, and hearing at its lower end on a plate secured to the hanger 4.

The vertically extending shaft 19 extends loosely through the plate 20 and has a bearing therein. On the lower end of the vertically extending shaft 19 is a block or enlarged end 19, having a square hole therein to receive the square upper end 21 of the tap 21, see Fig. A center 22 which extends within the lower end of the shaft 19, and is secured therein by a set screw 23, centers the tap 21.

A counterbalance mechanism is preferably used to raise the shaft 19 more easily. The counterbalance mechanism consists in this instance of a weight 24 attached to a bar 24, to which bar are attached two cords 25, which pass over the guide pulleys 26, mounted in arms 27 secured to a hanger 28 which is bolted to the lower end of the hanger 4. On the hanger 28 are two in= wardly extending arms 28, each carrying a guide pulley 29, over which pass the cords 25. The ends of the cords 25 are attached to a bar 30, through which loosely extends the vertically extending shaft 19. The bar 30 is attached to the shaft 19 by two collars 31 and 32. A collar 33 has a ball bearing 34, see Fig. 3, for the shaft 19. The bar 30 has at each end a grooved foot or end 30, which receives the vertically extending way 35 on the hanger 28, and on a corresponding hanger 28, see Fig. 4, so that the bar 30 may have a free up and down motion with the vertically extending shaft 19, and at the same time the shaft 19 may have a free rotary motion within the bar 30.

I will now describe the mechanism for holding and raising the die which is to be finished, which mechanism is preferably operated by the operator. The bench 1 has a plate 36 secured thereto. Said plate 36 has a bearing 36 for a vertically extending shaft 37, which has fast on its lower end a worm pinion 38, which meshes with and is driven by a worm pinion 39 fast on a shaft 40, having bearings on a stand 41 bolted to the plate 36, see Fig. 2. The shaft 40 has fast thereon a crank or handle 42, see Fig. 1. On the upper end of the shaft 37 is an elongated pinion 43, which meshes with and rotates a gear 44, having a screw threaded. downwardly extending stem 44 with a cen tral opening 44 therethrough. The screw threaded stem 44 turns in a screw threaded vertically extending opening 36 in the downward extension 36 on the plate 36, see Fig. 2. Bolted to the upper surface of the gear 44 the base 46 of a die holder 46, into which extends, and is secured by a set screw 47, a die 48, which has previously been bored out and roughly threaded, to receive the finishing tap 21. Through the rotary movement of the crank or handle 42, gear 39, gear 38, and elongated pinion 43, rotary movement is communicated to the gear 44, to communicate an upward movement to said gear, through the turning of the threaded stem 44 thereon in the threaded opening 36 in the downward extension 36 on the plate 36.

In Figs. 9 and 10 are shown a modified construction of the die holder for an open or sectional die, which is also shown in said figures. In said Figs. 9 and 10 similar reference numerals are used as in the other figures for corresponding parts. The die holder 46*, corresponding to the die holder 46, is secured by bolts, not shown, extending through holes 46 in the die holder 46 to the gear 44. The die holder 46 has a central vertical opening 46 therethrough for the passage of the tap 21, and also has two guide ways 46 thereon, between which the two parts of the open or sectional die 49 are held and guided. On the die holder 46 are two upwardly extending ears or lugs 46 each having a threaded hole therethrough for an adjusting screw 51. The adjusting screws 51 are turned in or out, to adjust the relative position of the two parts of the open or sectional die 49. On the lower end of threaded stem 44 of the gear 44 is screwed a nut which is screwed up tight against the lower end of the tubular stem of the plate 36 to prevent the gear 44 from turning.

The operation of my improvements, from the above description in connection with the drawings, will be readily understood by those skilled in the art. Through a belt, not shown, rotary movement is communicated to the belt pulleys 8 and 9, and the shaft 6 and the pinion 10, and through the rotary movement of the pinion 10, rotary movement is communicated to the gear 11, and through the pin 14, eecentrically mounted on said gear, an up and down movement is communicated to tl e block 15 in the slot 16 in the plate 16, and through the movement of said block 15, a transverse reciprocating movement is communicated to the plate 16, and through the rack 17, a reciprocating rotary movement is communicated to the pinion 18 and to the shaft 19, to cause the tap 21, secured at the lower end of said shaft to have a reciprocating rotary movement within the die 48, secured in the holder 46. The feeding up of the holder 46, through the turning of the crank or handle 42, and the intermediate connections to the gear 44, will cause the die to be finished by the tap. Tn finishing an open or sectional die shown in Figs. 9, and 10, the nut 52 on the threaded stem of the gear 44, is screwed up against the lower end of the tubular stem of the plate 36, to hold the gear 44 stationary, and the two parts of the open or sectional die 49 are preferably opened to receive the tap, and then closed onto the tap, and a reciprocating rotary movement is communicated to the tap in the manner above described, until the operation of finishing the die is completed.

The advantages of my improvements will be readily appreciated by those skilled in the art; they are of simple construction and operation.

It will be understood that the details of construction of my improvements may be varied if desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a machine for finishing dies, a tap holder, and automatic means for imparting longitudinal movements and reciprocating rotary movements thereto, of a die holder, and means for moving said die holder towards and away from said tap holder.

2. In a machine for finishing dies, the combination with a vertical shaft, of a tap holder carried by said shaft, a vertically movable sliding bearing in which said shaft rotates, a counterbalance for said bearing and shaft, means for imparting reciprocating rotary movements to said shaft, and a vertically movable and rotatable holder for the article to be finished by the tap carried by said tap-holder.

GEORGE H. WEBB.

Vitnesses:

ALFRED J. WEBB, ALBERT E. HAOKING. 

